Abstract: A method for forming a pontoon log and the pontoon log formed thereby. The method includes the steps of forming the pontoon log body including a flange; applying sealing tape to the flange; covering the body with a top member, the top member including a second flange or flange portion, with the sealing tape intermediate opposing flanges; driving a clip onto opposing flanges; and securing the clip to the flanges and through the sealing tape, thereby forming a pontoon log able to receive additional fasteners through the clip, opposed flanges and sealing tape without destroying a waterproof seal formed between the pontoon log body and top member.